Coil-support.



0- M. HOLST.

COIL SUPPORT.

APPLICATION FILED occ. 2a. 1912.

1,21 7,943. Patented Mar. 6, 1917.

WITNESSES! ATTORN EY .erating conditions.

UNITED STATES PATENT OFFICE.

OLE I. HOLST, OE UEG, PENNSYLVANIA, ASSIGNOE '10 WESTINGHOUSE ELECTRICAND IANUIACTUBIN G COKPANY, A CORPORATION 01 PENNSYLVANIA.

COIL-SUPPORT.

Specification of Letters Patent.

Patented Mar. 6, 1917.

Application filed December as; 1912. Serial m. nails.

porting structures for field coils of such machines The object of myinvention is to provide effective, durable, inexpensive and convenientlyconstructed coil-supports which shall counteract centrifugal force onthe field coils by reason of the rotative speed and hold said fieldcoils securely in osition under all operetofore, the coilsupportsprovided have been of rather -exensive and difiicult construction, whichobections I have overcome in this apparatus.

According to my present invention, I provide simple readilyconstructedand inexpensive field coil-supports which are sufliciently strong toresist successfully all centrifugal stresses and still be light andcompact. My

invention may best be understood by refer-.

ence to the accompanying drawings, in which Figure 1 is a sideelevation, partially in section, of a portion of a dynamo-electricmachine embodying my invention. Fig. 2 is a top plan view, artially insection, of the device shown in ig. 1. Figs. 3 and 4 are views embodyingvarious structural modifications of my invention, which modifications,however, are all included within the scope of my claims.

Referring to Figs. 1 and 2, the apparatus here shown comprlses arotatable field magnet frame 1 having polar projections 2, field coils 3associated with the polar projections 2, aplurality of bracing-p ates 4,severally engaging a centrally disposed portion of the sides 5 of fieldcoils 3, a thrust device 6, associated with bracing plates 4, and aradially disposed adjustable pressure member 7, operatively associatedwith thrust device 6 and magnet frame 1 for forcing bracing plates 4into close contact with field coils 3. Insulating strips 8 serve toprotect field coils 3 from grounding and mechanical injury. The thrustdevice 6 comprises a collar 9 and thrust members 10, the inner ends ofwhich are pivotally connected to said collar by pin nnsylvania, haveinvented a 11 and the outer ends of which are pivotally connected tolugs 12 on ribs 13 of bracin plates 4 by pins 14, or are otherwise loosey held. The pressure member 7 consists of a threaded rod 7 provided witha head 15; said rod operatively engages drilled holes in collar 9 andmagnet frame 1. Inward movement of rod 7 produces outward pressure onthrust member 10, which pressure is transmitted to bracing-plates 4 tocause the latter to closely engage the field coils 3 and hold themrigidly in position. Screws 16 project through holes in outer extensionsof racing-plates 4 into tips 17 or polar projections 2 and serve toprevent lateral displacement of said plates.

In the apparatus shown in Fig. 3, a plurality of integral lugs 12 aredisposed at the upper and lower portions of ribs 13 on bracing plates 4and a plurality of thrust devices, similar to the devices 6 of Fig. 1,are severally pivotally connected by pins 14 to bracing-plates 4, beingconvergently disposed toward each other. A radially disposed rod 22provided with an enlargement 23 and having its ends oppositely threaded,operatively engages threaded openings in the collars of the devices 6.The thrust devices tend to move in opposite directions when the rod 22is turned.

The apparatus shown in Fig. 4 difiers only in minor details from thatshown in Fig. 3. Difierent forms of threaded rod 24 and of lower collar27 are used. The latter is provided with a cylindrical recess 26 toreceive the lower end of rod 24.

I do not wish to be restricted to the specific structural details hereinset forth, as man changes may be effected without departing from thespirit and scope of my invention, and I desire that only suchlimitations shall be imposed as are indicated in. the appended claims.

I claim as my invention:

1. In a dynamo-electric machine, the combination with a rotatable memberhaving a plurality of polar projections, field coils severally disposedthereon, and bracing plates severally engaging said field coils, of aplurality of members pivotally connected to said bracing plates, andoperative means associated with said members for securing said fieldcoils in position.

2. In a dynamo-electric machine, the combination with a rotatable memberhaving.

a plurality of polar rejections, field coilseffect lateral movement ofsaid bracing plates.

3. In a dynamo-electric machine, the combination with a rotatable memberhaving a plurality of polar projections, field coils severally disposedthereon, and bracing plates severally'engaging said field coils, of aplurality of linkage members severally engaging saidbracing plates, andradially disposed and operative means cooperating with said devices forforcing said bracing plates into intimate engagement with said fieldcoils.

4. In a dynamo-electric machine, the com-- bination with a rotatablemember having a plurality of polar projections, field coils severallydisposed thereon and bracing plates severally engaging said field coils,of a linkage mechanism embodying a toggle joint device, and"radiallydisposed and operative means associated therewith and co= operating withsaid bracing plates for supporting said field coils rigidly in position.

5. In a dynamo-electric machine, the combination with a rotatable memberhaving a plurality of polar projections, field coils severally disposedthereon, and bracing plates severally engaging said field coils, of alinkage device embodying a plurality of toggle joint members, andradially disposed and operative means associated withsaid device andsaid rotatable member and cooperating with said bracing plates forsupporting said field coils rigidly in position. 6. In adynamo-electricmachine, the combination with a rotatable member having a plurality ofpolar projections, field coils severally disposed thereon, and bracingplates severally engaging said field coils, ,of a toggle joint deviceand a radially disposed adjustable pressure member adapted to cooperatewith said device for forcing 9. art said bracing plates and hold-ingsaid eld coils rigidly in position.

.7. In a dynamo-electric machine, the com bination with a rotatablemember having a plurality of polar projections, field coils severallydisposed thereon, and bracing plates severally engaging said fieldcoils, of a plurality of toggle oint members, and a radially disposedadjustable pressure member adapted to cooperate'with said toggle jointmembers and said rotatable member for forcing said bracing plates intointimate contact with said field coils. f

8. In a dynamo-electric machine, the combination with a rotatable memberhaving a plurality of polar projections, field coils severally isposedthereon, and bracing plates sev ally engaging said field coils, of apluralit of links pivotally connected to said bracing plates, a memberpivotally connected to said links, and a rod operatively associated withsaid member and adapted, by "radial movement thereof, to effect lateralmovement of said bracing plates.

9. In a dynamo-electric machine, the combination with a rotatable memberhaving a plurality of polar projections, field coils severally disposedthereon, and bracing plates severally engaging said field coils, of aplurality of links pivotally connected to said bracing plates, a collarpivotally connected to said links, and a threaded rod operativelyassociated with said collar and said rotatable member and adapted, inconjunction with said collar and links, to effect lateral movement ofsaid bracing plates.

In testimony whereof, I havehereunto subscribed my name this 5th day ofDec, 1912.

OLE M. HOLST,

Witnesses:

J. V. GROWN, B, B. HINEs.

